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PREview (Process and Requirements Viewpoints) is a requirements method which focuses on the early stage of Requirements Engineering: discovering and documenting requirements. PREview uses a Viewpoint-Oriented Approach to enable the conversion of top-level goals (“concerns”) into requirements and constraints.〔Sawyer, P., Sommerville, I. and Viller, S. (1996). PREview: Tackling the Real Concerns of Requirements Engineering. ''Cooperative Systems Engineering Group, Technical Reports 1996''〕 “Preview aims to improve the quality of requirements specification by providing a framework which can support both requirements elicitation and the structuring of the requirements document.〔Sommerville, and I., Sawyer P. (1997). Viewpoints: principles, problems and a practical approach to requirements engineering, A''nnals of Software Engineering'' 3 pp.101-130.〕” == Overview == PREview focuses on viewpoints for requirements engineering of computer-based systems but the viewpoint-concept is also used in various other areas of expertise. In communications, the ODP (Open Distributed Processing) Reference Model defines viewpoints from which a system can be specified.〔Farooqui, K., Logrippo, L., and de Meer, J. (1995). The ISO Reference Model for Open Distributed Processing: an Introduction. ''Computer Networks and ISDN Systems'', 27(8), pp. 1215-1229.〕 In CSCW viewpoints are also used to structure organisational analyses. However, these have not adapted the explicit notion of a viewpoint, but use it as a general multiple perspective approach to analysis. The CORE method developed by Mullery〔Mullery, G. (1979). CORE - A Method for Controlled Requirements Specification. In ''Proc. 4th Int. Conf. on Software Engineering'', Munich. 126—35〕 was the first method to use viewpoints as an explicit notion. Nuseibeh〔Easterbrook, S. and Nuseibeh, B. (1996). Using ViewPoints for inconsistency management. ''BCS/IEE Software Eng. J.'', 11(1): 31-43〕〔Nuseibeh, B., Kramer, J. and Finkelstein, A. (1994). A Framework for Expressing the Relationships between Multiple Views in Requirements Specifications. ''IEEE Trans. on Software Eng.'', 20(10): 760-73 〕 and Greenspan〔Greenspan, S. and Feblowitz, M. (1993). Requirements Engineering Using the SOS Paradigm. In ''Proc. RE’93'', San Diego, CA. 260-65〕 have developed similar methods, in which viewpoints are a central notion. PREview is a pragmatic adaptation of these older methods. The traditional viewpoint-oriented approaches are quite inflexible, which makes it hard to introduce these methods into existing businesses. PREview is not prescriptive about the methods and notations to be used, thereby making it easier to be integrated into existing requirements methods. PREview aims to improve the quality of requirements specification by providing a ''framework'' for the early phases of the requirements process. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「PREview」の詳細全文を読む スポンサード リンク
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